Doom and gloom predictions. Wild predictions and LOTS of them. If they don't come true, then they're forgotten and nobody is held accountable for being ridiculous. Or... as in the case of Moore... he'll take credit by saying that because of his "warning" people acted to avoid the doom he predicted.

And, inevitably... if someone makes ENOUGH crazy predictions (for example Sylvia Browne comes to mind) occasionally there's a "hit" (or something close to it). And when that happens, the other 99 misses are forgotten, but the one random "hit" his heralded as irrefutable proof that the naysayer and doom/gloom fetishist is a GENIUS.

It's all so silly. Just like Michael Moore, it's totally and completely ridiculous.

In the end, I think the best question is this: What useful purpose does it serve? It's just another example of how people are oddly willing to do and say things that create an atmosphere of fear and hopelessness and negativity. Negativity generates apathy. Apathy discourages voter turnout. Low voter turnout gives Republicans a chance to steal the elections.